These are from the Sunset Seafood cookbook (1985). The recipe is written for crab, but we've been subbing canned salmon in them for years. We like them with Vegan Fried Celery & Cabbage (Recipe #21095) on the side.
Finely crumble crackers into a bowl; you should have 1 cup of coarse meal. Flake crab meat or salmon into bowl with crumbs, breaking up any skin and bones if using the salmon (or remove them if you prefer). Add Worcestershire, hot sauce, parsley, mustard, and mayonnaise. Mix until blended. Add egg and blend well.
Shape mixture into 8 patties. Lay them on waxed paper or parchment near the frying pan. In a frying pan (I prefer cast iron), melt 1 tablespoon of the butter over medium heat. Cook 4 patties until browned, about 3 minutes. Add another 1/2 tablespoon of butter, turn and brown the other side. Repeat with the remaining butter and patties. You can keep the first batch warm in the oven.
To plate, sprinkle patties with chopped parsley; serve with lemon wedges.